It was rebuilt by Eggman and was second used as Eggman's second base in "Cruise Blues" after the Egg Fort failed. In episodes 25 and 26, Eggman transformed the Egg Fort II into the E-99 Eggsterminator, powered by the Chaos Emeralds. However, Chris took the emeralds and they fell into the sea, where they were absorbed by Sonic and transformed into Super Sonic, destroying the Eggsterminator.